13687843 has 8 divisors (see below), whose sum is σ = 14789936. Its totient is φ = 12592800.

The previous prime is 13687831. The next prime is 13687853. The reversal of 13687843 is 34878631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13687843 - 2⁵ = 13687811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13687796 and 13687805.

It is not an unprimeable number, because it can be changed into a prime (13687853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2713 + ... + 5893.

It is an arithmetic number, because the mean of its divisors is an integer number (1848742).

Almost surely, 2^13687843 is an apocalyptic number.

13687843 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13687843 is a deficient number, since it is larger than the sum of its proper divisors (1102093).

13687843 is a wasteful number, since it uses less digits than its factorization.

13687843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3525.

The product of its digits is 96768, while the sum is 40.

The square root of 13687843 is about 3699.7085020309. The cubic root of 13687843 is about 239.2094532399.

The spelling of 13687843 in words is "thirteen million, six hundred eighty-seven thousand, eight hundred forty-three".